In 1 pounds per square inch there are 0.068948 bars. Meanwhile in 1 bars there are 14.503774 pounds per square inch. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Bars to Pounds per square inch calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert pounds per square inch (psi) to bar, multiply by the fixed factor:
Quick check examples:
For a fast estimate in your head, use:
This psi to bar conversion works for any pressure value since the factor stays the same.
PSI is a unit of pressure. It measures how many pounds of force press on one square inch of area. PSI is common in the United States for tire pressure, air tools, and many gauges.
A bar is a metric unit of pressure. It’s close to standard air pressure at sea level. Bar is common in Europe and on many industrial pressure gauges.
Use this formula:
This gives a close result for most needs. For more precision, keep more decimal places.
1 PSI = 0.0689476 bar (about 0.069 bar).
1 bar = 14.5038 PSI (about 14.5 PSI).
30 PSI = 30 × 0.0689476 = 2.068 bar (about 2.07 bar).
35 PSI = 35 × 0.0689476 = 2.413 bar (about 2.41 bar).
40 PSI = 40 × 0.0689476 = 2.758 bar (about 2.76 bar).
50 PSI = 50 × 0.0689476 = 3.447 bar (about 3.45 bar).
100 PSI = 100 × 0.0689476 = 6.895 bar (about 6.90 bar).
A bar is a larger unit than PSI. 1 bar equals about 14.5 PSI, so bar values look smaller than PSI values for the same pressure.
Different regions use different units. Many tires, air pumps, and car manuals show both PSI and bar to avoid confusion. Always match the unit on your gauge to the unit in your target pressure.
For most daily uses, rounding to two decimal places is fine. For lab work, high-pressure systems, or calibration, use more decimals and follow your required tolerance.
No. PSI and bar don’t convert by a simple decimal shift. Use the factor 0.0689476 to avoid errors.
Standard air pressure at sea level is close to 1 bar, but not exact. Standard atmosphere is 1 atm = 1.01325 bar. This matters in science and some engineering work.
A reading of 0 psig is not zero absolute pressure; it’s about 14.7 psia at sea level (about 1.01 bar absolute).
The Calculate Box tool to convert pounds per square inch to bars uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a pounds per square inch value in the box and have it instantly converted to bars.